The performed research is truly vital. as As (arsenic) concentration in food products is now of great interest. The US ATSDR and EPA enlist As among the most toxic substances which are dangerous for human health. We suggest a procedure for separate quantitative mass fraction determination for organic (oAs) and non-organic (iAs) arsenic compounds in sea products with solid phase extrac... https://www.roneverhart.com/Pedaltrain-Classic-1-w-Soft-case/